nexxus

iTrader: (315)

I bought a BLS571SV for my Touring car when I got a 7px, tried the SR mode but you lose telemetry but I couldn't tell the difference, just meant if I used another radio I had to reprogram the servo each time to not want an sr mode signal and it was a giant pain in the backside.

I doubt you'll find a difference, certainly not a difference worth the $190 price tag on the servo at A Main

Roelof

The fastest setting with a normal servo is T-FHSS w/o telemetry or in SR mode with normal servo setting. You will get a framerate of 333Hz max (with Telemetry about 280Hz) that will give servo information each 3msec. With SR you will get each servo information in 1.2 msec but in SR you have a smaller pulse width so you will gain about 2msec in total.

Hardly noticeable but driving a fast car on a small track in a rithm you will take the corners much more constant.

beyondthepack

iTrader: (5)

nexxus

iTrader: (315)

Or you will convince yourself that you do to rationalize the $200 you just spent on a servo to drop from a frame rate you can't notice to another frame rate you can't notice.

Ever heard of the placebo effect?

If I got one of the big wigs in RC land to say Red wheel nuts make you 0.1 a lap faster watch how many people have red wheel nuts next week.

Panther6834

iTrader: (2)

Sorry, I prefer black and/or blue wheel nuts. 😁

nexxus

iTrader: (315)

Then you're losing 0.1 second a lap!

Panther6834

iTrader: (2)

It's alright, as blue gives a 0.2sec advantage in cornering. As for the SR servos, while some ARE overpriced, the are a few reasonably-priced models, which I might consider putting in my TLR 22 5.0 SR, and possibly even in my TLR 8ight-XE. Just need to determine what specs I'm in need of, first.

Roelof

True. The normal T-FHSS is fast enough but with Sanwa I know people who did feel an improvement between the normal mode and SSR mode. To me 140+ dollar for an SR compatible servo is just too much but if you want/can spend the money, why not?
Why would you buy the 7PX (or in my case the 7XC) in the first place?

nexxus

iTrader: (315)

Because I thought I could watch Pron on it while waiting on the drivers stand....

Sadly I can't so, lesson learnt :P

Panther6834

iTrader: (2)

Actually using an SR servo isn't the only reason people would choose the 7PX...there are several other reasons. First, setting the 7PX for "SR (Normal)" provides a small improvement. Then there's the color, touch-enabled screen. Let's not forget the entirely updated menu system, not to mention all of the additional programmability not offered by the 4PV (or even the new 4PM). Lastly...although this will only be applicable to certain people...the 7PX provides 7 channels, which numerous non-racers would make good use of. There are probably several other reasons why someone would get the 7PX that have absolutely nothing to do with ''SR Mode'.

Roelof

All true, but basically it is the same, you can buy the 7PX for the looks, the options etc while the much cheaper 4PV, 3PV, 4PLS etc will do the same. Some people want to use the fastest option and want to see if SR is better, like more "dialed in" as the Sanwa SSR users are explaining. And yes, that can be different for everyone.

As mentioned, to me getting into SR mode is just too expensive but these narrow band servo's are getting more common and faster so in the near future they will be more affordable and east to get from many brands.

And to answer the not yet asked questio why I have bought a 7XC, just because my T3VCS with Spektrum HRS module and receivers is getting old. I have a 4GRS but that does not feel right in my large hands, the 7XC is bigger and feels much better.

Panther6834

iTrader: (2)

Honestly, your comments don't make much sense. In your first sentence, you state that all the differences i pointed out are all true, but then you make the claim that it's still the same. Obviously, both statements can't be true. Second, you say that getting into SR is "too expensive". While some SR servos are $150+, there are others below $125...even below $100. Finally, you say the 7PX/7XC ” is bigger and feels much better" than the 4GRS, yet you've completely ignored the 4PV & 4PM. WHY, especially the 4PM, which had different group sizes exactly as the 7PX does.

Dan

iTrader: (75)

I got my BLS571SV for under $120. Granted its not from a US authorized Futaba dealer (would have been $190) but its still new. This is a reasonable price for a brushless servo of this quality. I also have an S9570SV servo that I paid $60 for new from Tower once ($80 normal price at the time) that I'm currently using in SR mode in one of my F1 cars. Futaba just released a firmware update that allows it to operate in SR.

On a big, open outdoor track, the benefits may not be worth it if you're satisfied with your existing system. On a tight indoor carpet track running 1/12, yes, you could benefit from it. In this regard, I do notice a small difference.

Whether one can feel a difference is subjective. (law of diminishing returns) I'm far from a pro driver, take it for what its worth...

dun4sho

iTrader: (13)

Dan

iTrader: (75)

BLS571SV
OS Speed T1

S9570SV is also low profile and now SR compatible with 7PX firmware update.